I have a text file that looks like this:
./4F6cFLnAAFc.png
./4Flj9plmKGQ.png
./4fQeHtSdw80.png
./4I9iibPLdBw.png
./4J-dRA3MGc8.png
./4mdEsouIXGM.png
./4-_-wQc3EGE.png
./595Tiga1gIg.png
./60u_ctp6UIw.png
./64bH_27Ehoc.png
./64_ZfIemRGM.png
./66pQLO--Ghk.png
./69rDtSpshAw.png
./69-YUSazuic.png
I'd like to replace the .
at the beginning of each line with 'myString' using node.js. So each will end up looking like: myString/4F6cFLnAAFc.png
I am trying to use a regular expression but I suspect it can be done using read and write streams.
var fs = require('fs');
fs.readFile('filelist.txt', 'utf-8', function(err, data){
if (err) throw err;
console.log(typeof(data)); // string
data.replace(/\.\/+/, 'myString');
});
What regex will work or what's the best way to edit this file using node?
Here are two options for Sync or Async depending on what you want.
var fs = require('fs');
function readWriteAsync() {
fs.readFile('filelist.txt', 'utf-8', function(err, data){
if (err) throw err;
var newValue = data.replace(/^\./gim, 'myString');
fs.writeFile('filelistAsync.txt', newValue, 'utf-8', function (err) {
if (err) throw err;
console.log('filelistAsync complete');
});
});
}
function readWriteSync() {
var data = fs.readFileSync('filelist.txt', 'utf-8');
var newValue = data.replace(/^\./gim, 'myString');
fs.writeFileSync('filelistSync.txt', newValue, 'utf-8');
console.log('readFileSync complete');
}
readWriteAsync();
readWriteSync();